From: Thomas Sondergaard <tsondergaard@...>
Date: 2002-05-02T06:30:12+09:00
Subject: Re: is this FAQ material? -> adding instance methods to an	object....

Might be.

I think this is nicer for adding methods from inside a method
definition:

def get_object_with_name
  anObject = MyObject.new
  class << anObject
    def name
      @name
    end
  end   
  anObject
end

Thomas

On Wed, 2002-05-01 at 22:50, Patrick May wrote:
> I was trying to add instance methods to an object.  I figured this out
> by looking at some library source, but I had problems finding this
> info on ruby talk or in the FAQ.
> 
> I know that I've seen this question answered on the list before, but
> it's hard to narrow down to it.  The search terms "define instance
> methods object" touches on a wide variety of messages :-)
> 
> I didn't see it when I looked at the FAQ at
> http://www.rubycentral.com/faq/rubyfaq.html
> 
> Is this something that is worth a FAQ entry?  Something like:
> 
> * How can I define methods on an object at run time?
> 
> class MyObject
>     @name = "name"
> end
> 
> anObject = MyObject.new
> def anObject.name
>     @name
> end
> 
> puts anObject.name           # <= returns "name"
> 
> # example from inside a method definition:
> 
> def get_object_with_name
>     anObject = MyObject.new
>     eval <<-END
>         def anObject.name
>             @name
>         end
>     END
>     anObject
> end
> 
> foo = get_object_with_name
> puts foo.name                # <= returns "name"
> 
> ~ Patrick